The concept of a simple correlation model for shadow fading has been widely adopted in LTE co-existence studies mostly employed in uplink case. The propagation attenuation is modelled as the product of the path loss and the shadow fading. The shadow fading is well approximated by a log-normal distribution. Let z denotes shadow fading in dB with zero mean and variance σ
2. Then the shadow fading of path from one UE to the
i-th BS is expressed as
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Figure 209 presents how to set-up the pathloss correlation in SEAMCAT (only available for OFDMA). The panel is similar for the OFDMA DL and UL.
Figure 209: Illustration of the pathloss correlation – input parameters
Figure 210: Illustration of the pathloss correlation principle
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